I spent hours trying to fuigure out WHY this didn't work.. and I send him an email. Turns out mu customer bought the wrong thing extension.. which needed more extensions at an addtional costs to work.
After having to spend HOURS to get this working I asked him to make this right. He didn't.
Sadly the software may be awesome.
I can certainly understand wanting to make a profit. But the customer support was HORRID. But well if there a problem with the people behind it. I cannot reccommend it.
I went ahead and went with another custom filter extension.
Kind of funny situation here: the reviewer didn't think of time zones. And while there was a night time he considered the delay in reply as a "negative answer".
Let's keep that in mind.